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Nov. 13, 1962
A. J. KOWALK
3,063,451
SELF-VENTING TYPE NEEDLE
Filed Sept. 28, 1959
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52
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FIG‘. 6‘.
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ARTHUR J. lrgvwygkégk
“Maw/gym
TORNEY
United States Patent O?ice
3,?63,45l
Patented Nov. 13), 1982
2
3,063,451
SELF-VENTING TYPE NEEDLE
Arthur I. Kowaik, RED. 3, Box 81, Aberdeen, Md.
Filed Sept. 28, 1959, Sex‘. No. 842,783
7 Claims. (Cl. 128-221)
This invention relates generally to medical instruments,
FIG. 7 is a side elevation taken in the direction of line
7—7 of FIG. 1.
Referring now to FIGS. 1 and 7 of the drawings, there
is illustrated one embodiment of a self-venting bleeding
needle 19 incorporating features of this invention for
withdrawing blood from a person or animal. This self
venting bleeding needle 10 consists of a substantially
and, more particularly, it pertains to a new type of self
cylindrical hollow needle 12. having a pointed end, and
venting needle for use in withdrawing ?uid from or in
with a plurality of parallel spaced grooves 14 provided in
jecting ?uid into a closed container.
10 its peripheral surface extending along the longitudinal di
In the conventional process of withdrawing or injecting
rection of the needle. These grooves 14, in the embodi
a ?uid, such as blood, from or into a closed container, a
ment of the needle 16‘ shown in FIGS. 1 and 7, extend
hollow cannula or self-venting type needle is often used.
throughout the length of the hollow needle 12. In some
This cannula or needle is inserted usually into the con
instances, instead of using equally spaced grooves 14
tainer through a rubber stopper or a stopper of equivalent 15 around the peripheral surface of the needle 12, one or
composition. One of the problems encountered in this
two grooves can be utilized, depending upon the condi
operation is that an air lock is developed within the con
tions under which the hypodermic type needle 10 is to be
tainer, which causes either a vacuum or positive pressure
within the container, thus preventing the withdrawal of
?uid from or the injection of ?uid into the container.
In the past, such a problem has been variously over
come by de?ecting the cannular or needle to one side,
thus causing a spreading of the stopper, or by placing
another needle or hollow object in the stopper to vent
utilized.
The bleeding type needle 10 is usually provided with
a ?nger grip 16 for use in facilitating the insertion of the
needle into the vein of a patient illustrated in FIG. 4.
By extending the grooves 14 to the pointed end of the
hollow needle 12, a serrated ended needle 10 is obtained.
A needle 1%, of this design, can be effectively utilized for
the container. Also, the problem has been solved by 25 the simultaneous injection of a ?uid into a container or
variously constructing the cannula or needle with valves
and apertures, and/or use of parallel tubes to allow the
equalization of the pressure differential produced during
the operation of either withdrawing ?uid from or injecting
receiving ?uid from another container or other source
and its replacement by air in the same operation.
Referring now to FIGS. 2, 4, and 5 of the drawings,
there is illustrated a second embodiment of a self-venting
?uid into the container.
30 type of bleeding needle 18. This bleeding needle 18 con
It is an object of this invention, therefore, to provide
sists, likewise, of a hollow needle 20 in which there is
a new design of a self-venting type of needle or cannula.
Another object of this invention is to provide a self
venting needle or cannula which can be effectively and
provided a plurality of parallel spaced and radially ar
ranged grooves in the peripheral surface of the needle.
This embodiment of the bleeding type needle 18 diifers
et‘?ciently used to simultaneously withdraw ?uid from or 35 from the bleeding type needle 10 of FIGS. 1 and 7 in that
transfer a ?uid from a container and replace it by air in
the same operation.
Another object of this invention is to provide a new
design of a self-venting needle which can be effectively
and e?iciently used for the injection of a ?uid into a con
tainer and allow the air therein to escape in the same
operation.
Still even another object of this invention is to provide
a new design of a hypodermic type needle in which there
is provided a number of grooves or ?utes for bleeding
displaced air in or out of a container.
And another object of this invention is to provide a
the grooves 22 extend from one end of the needle and
terminate intermediate the pointed end of the needle 18.
A ?nger grip 24 is also provided on the bleeding needle
18 to facilitate the injection of the needle into a vein of
a patient or animal to withdraw blood as illustrated in
FIG. 4 of the drawings.
In the embodiment of the hypodermic needle 18 shown
in FIGS. 2 and 4, such a needle can be utilized for the
Withdrawal of blood from a vein into the glass receptacle
34 to replace the air therein in the same operation. In
FIG. 4, the self-venting bleeding needle 18 is shown hav
ing its grooved end pass through the stopper 36 into the
glass receptacle 34 for receiving the blood from the vein
new design of a self-venting type needle which is eco
nomical to manufacture, e?icient and reliable in opera
of a patient. The pointed end of the needle 18 is in
tional use, and which is easy to install and manipulate 50 serted through the wall of the vein to withdraw the blood
for withdrawing ?uid from or injecting ?uid into a closed
from the vein through the hollow needle 29 into the glass
container.
receptacle 34. Any air in the glass receptacle 34 is passed
These and other objects and advantages of this inven
out of the receptacle through the grooves 22, as best
tion will become more readily apparent from the follow
illustrated by the direction of the arrows in FIG. 4.
55
ing speci?cation and accompanying drawings in which:
In FIGS. 3 and 6, there is illustrated a third embodi
FIG. 1 is a side elevation of one embodiment of a self
ment of a self-venting type of bleeding needle 26 which
venting needle incorporating features of this invention;
consists of a substantially cylindrical hollow needle 23
FIG. 2 is a side elevation of a second embodiment of a
having a plurality of partial-length grooves 30 formed in
self-venting needle incorporating features of this inven
its peripheral surface. This needle 26 is designed so that
60 it can be attached to a syringe ?tting 32.
tion;
FIG. 3 is a side elevation of a third embodiment of
a self-venting needle incorporating features of this in
vention;
'
The self-venting bleeding needle of FIG. 3 is shown
in an operational position in FIG. 6 of the drawing. The
syringe ?tting 32 is coupled to a syringe 42, and the
needle 26 is passed through a puncturable type cap 45}
FIG. 4 is a side elevation, with parts being shown in
cross-section, of the embodiment of the self-venting needle 65 into a container 38 having a ?uid therein.
As the syringe 42 withdraws the ?uid from the con
of FIG. 2 shown in operative position;
tainer
38, air passes through the partial length grooves 30
FIG. 5 is a cross-section taken along line 5—5 of
into the container 38 so as to equalize the pressure on
FIG. 4;
the inside of the container with that on the outside of the
FIG. 6 is a side elevation of the self-venting needle of
container 38.
FIG. 3 illustrating its operational use in connection with
In essence, therefore, the present invention consists in
the withdrawal of a ?uid from a container; and
providing several di?erent designs of self-venting bleeding
4
3,063,451
J
.
wall cylindrical tubular member having an inner bore
which is continuous and uninterrupted and having one
end thereof truncated to form a needle point, said tubu
lar member having at least one longitudinally extending
groove comprising a depression in the outer peripheral
surface thereof, with the cross sectional area of said groove
type needles 10, 18, and 26 in which grooves 14, 22, and
39, respectively, are utilized in the outer or peripheral
surface of the needles or cannulas to provide channels to
facilitate the circulation of air by the same needle that
withdraws ?uid from or injects ?uid into a container, such
as 34 and 38.
V
being small as compared to the cross sectional area of
said inner bore to allow for the passage of air through
said groove in one direction when said needle is inserted
Such designs of self-venting bleeding type needles 10,
18, and 26 present inexpensive, simple modi?cations of
V the conventional needle or cannula to more easily ful?ll
the same purposes as the more complicated methods men
10 through a self-sealing puncturahle material and with said
tioned previously in this speci?cation, namely, that of
de?ecting the needle to one side to cause a spreading of
the stopper or by placing another needle, or hollow ob
ject, in the stopper to vent’ the container Within the stop
per, or by variously constructing the needle with valves
and apertures and/or parallel tubes to allow the equaliza
tion of they pressure differential produced during the op
eration of withdrawing ?uid from or injecting ?uid into
inner bore of said tubular member passing ?uid simul
taneously in the opposite direction of flow of said air.
2. A self venting type of needle, comprising, a thin
cylindrical shaped tubular member having an inner bore
which is continuous and uninterrupted and having a
truncated end forming a needle point, said tubular mem
her having a plurality of longitudinally extending and
radially arranged grooves comprising depressions in the
outer peripheral surface thereof, with the cross sectional
It is to be noted that in the various embodiments of the 20 areas of said grooves being small as compared to the
a closed container.
cross sectional area of said inner bore to allow for the
needle 16, 18, or 26, that the needle will be weakened by
grooves which are too large unless the wall of the needle
passage of air through said grooves in one direction when
said needle is inserted through a self sealing puncturable
material, with said inner bore of said tubular member
passing ?uid simultaneously in an opposite direction of
?ow of said air.
3. A self venting type of needle as recited in claim 2,
wherein said grooves are spirally arranged in the pe
ripheral surface of said needle.
4. A self venting type of needle as recited in claim 2,
wherein said grooves extend throughout the length of
said needle.
5. A self venting type of needle as recited in claim 2,
wherein said grooves terminate short of the pointed end
of said needle.
6. A self venting type of needle as recited in claim 2,
wherein said grooves are arranged intermediate the end
is of proper thickness. ' Many small grooves in the bleed
ing needle 16, 18 or 26, will give a grooved arrangement
of proper magnitude to allow more freedom of passage
for the air and will not Weaken the needle.
It has also been determined that the smaller the grooves
in the peripheral surface of the self-venting type of bleed
ing needles 1t), 13 and 26, the more surface tension of
the ?uid will prevent the ?uid from retracting down the
grooves after the ?uid is forced into the container under
pressure, or during withdrawal of the fluid from a con
tainer through the hollow’ portion of the needle.
At the
same time, the air will be able to enter or leave the con
tainer through the same grooves.
The grooves 14, 22, and 34} formed in the self-venting
.type of needles 10, 18, and 26, respectively, can'be of
various shapes and sizes, and they can be formed spirally
around the peripheral surface of the needle, or straight
of said needle.
'
7. A self venting type of needle as recited in claim 2,
as shown in FIGS. 1 and 7 of the drawings, or can be 40 and means including a ?nger grip secured to said needle.
run in various directions, depending upon the design. con
ditions for the needle. Also, as previously pointed out,
References Cited in the ?le of this patent
UNITED STATES PATENTS
the grooves 14, 22, and 310 in the needles 10, 18 and 26,
respectively, can extend throughout the length of the
556,777
needle or be terminated short of the length of the needle.
If they are terminated short of the pointed end of the
needle, such a design of the needle can also be used
673,268
effectively for puncturing skin of a patient or surfaces
where desired.
7
'
These and other modi?cations and variations of the
present invention are possible in light of the above teach
ings. It is, therefore, to be understood that Within the
scope of the appended claims, the invention may be prac
ticed otherwise than as speci?cally described.
What is claimed is:
1. A self-venting type of needle, comprising, a thin
50
v1,045,326
“1,705,763
2,409,343
2,416,391
2,541,272
2,697,438
Savoie ______________ __ Mar. 24, 1896'
Huntington _______ __,__._ Apr. 30, 1901
Ru?in ______________ .__ Nov.
Hasbrouck ____Q_ ____ __ Mar.
Curtis _______________ __ Oct.
Hixson ______________ __ Feb.
Murphy _____________ __ Feb.
Hickey ______________ __ Dec.
26,
19,
15,
25,
13,
21,
1912
1929
1946
1947
1951
1954
France ______________ __ Dec. 6,
1948
FOREIGN PATENTS‘
945,778
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